New Interpolation Method Based on the Luminance of the Bayer Pattern Image

• 1、Department of Signal and Information Processing,Taiyuan University of Technology

Abstract：Most digital cameras acquire imagery with a color filter array(CFA), sampling only one color value for each pixel and interpolating the other two color values. We discuss in this paper two key observation : 1)obtain the luminance through the frequency analysis of a CFA image; 2) it is more smoother in image chrominance domain,and propose new interpolation methods. Our methods first extract the luminance using a filter, and then gain the chrominance in bayer format by subatracting the luminance image fron the CFA bayer image and interpolate in the chrominance domain using bilinear interpolation, smooth hue interpolation, and color difference interpolation , finally obtain the full color image. Experimental results on simulated CFA images verify that the proposed methods outperforms the other methods both visully and in terms of peak signal-to-noise ratio, at a notably lower computional cost. So our methods are simple and excellent.

Keywords： image interpolation color filter array(CFA) bayer pattern frequency analysis